Pictures folder is the default location for storing images. While the App user may want to store them elsewhere, Apple wants developers to stick with the
Pictures folder and has provided standard ways to locate and access this folder.
App Sandboxing, which is required if we want to put an App in the Mac OS X App store, requires us to use the standard methods of accessing the
Pictures folder. It is very important to use these methods and not create an App that accesses the user's filesystem in a non-standard manner by trying to write to other folders.
To begin, we will implement the interface to the browser.